基于LPC935单片机的智能太阳能路灯控制系统的设计

随着世界能源危机日益严重,利用太阳能成为解决能源问题的一大途径,在此背景下开发智能太阳能路灯意义重大。本文介绍了智能太阳能路灯系统的组成及工作原理,采用LPC935单片机作为主控制器,结合密封铅酸蓄电池充电专用芯片UC3906,实现了对密封铅酸蓄电池最佳充电所需的全部控制和检测功能,延长了系统的使用寿命。通过热释电红外、微波双鉴传感器技术及以无线通讯技术,实现了红外微波探测、相邻路灯间的无线通讯以及主副灯的智能化切换,达到了节能减排的效果。     

基于单片机的太阳能路灯智能控制系统设计

针对目前太阳能路灯系统,由于控制器对蓄电池保护不充分导致蓄电池使用寿命短和系统可靠性不高等问题,基于单片机设计实现了一种太阳能路灯智能控制系统。该系统以太阳能电池板的各种充电过程、高亮度led路灯的点亮时间、功率大小等参量为依据,利用蓄电池剩余容量(SOC)控制法设计实现了,基于单元机的自适应新型太阳能路灯控制系统,避免了蓄电池出现过充、或过放现象,延长了蓄电池的使用寿命,提高了太阳能路灯系统运行可靠性。     

无线测控技术在太阳能路灯综合管理中的应用

以解决现存太阳能路灯无法实现工作状态和参数的远程测控等问题为目的,将分布智能式结构的概念引入路灯管理控制;采用以内嵌微控制器等模块的测控终端为智能节点、通过无线数传电台组建无线网络的方法,设计完整的太阳能路灯远程无线综合管理与控制系统;实现对太阳能电池板、蓄电池及LED灯工作电气参数的实时监测,以及测控分站与测控主机、上位机依次阶梯递进构成通信网络;该系统诊断故障及时准确、组网便捷,在节能减排、广泛推广太阳能路灯方面具有很大的意义.     

智能太阳能LED路灯控制系统的研究

针对目前路灯控制系统中的能耗大、穿透力弱、覆盖小等问题,提出了一款智能太阳能LED路灯控制系统,通过ZigBee和GPRS技术,构建了太阳能LED路灯的远程控制,实现了实时故障报警,故障路灯位置显示,亮度调节,手机APP操作等功能.测试表明:系统运行稳定,能耗小.     

基于双组网模式的太阳能路灯控制系统

为了实现对太阳能LED路灯的远程管理,同时达到低功耗、高稳定性、低复杂度的要求,提出了一个基于ZigBee网络和RS-485总线的太阳能路灯远程控制系统。该系统使用ZigBee技术对太阳能路灯进行自组网,并采用RS-485总线作为补充。基于以上两种网络,上位机最终实现了对太阳能路灯的远程控制与管理。主要介绍了该系统的总体设计方法,软、硬件实现,以及在实际环境中的测试结果。     

太阳能LED路灯控制系统的设计

设计了一套基于STC12单片机的太阳能LED路灯控制系统,系统采用变步长的电导增量法跟踪太阳能电池板最大功率点,充分利用太阳能电池板的能量,对铅酸蓄电池充电。同时实时监测铅酸蓄电池的电压防止蓄电池过充、过放等现象;对LED路灯采用多段式的恒流控制,通过环境照度的监测控制LED路灯在不同电流强度下工作,以增强LED路灯的使用寿命,实现节约用电的目的。     

基于ARM的太阳能路灯控制系统的设计与实现

本文主要介绍了一种基于ARM的太阳能路灯智能控制系统的设计与实现,首先阐述了智能太阳能路灯控制系统整体方案,然后介绍了硬件、软件设计实现,重点探讨了智能太阳能控制系统软件设计流程,MPPT控制和电池充电控制软件算法的实现.最后做了总结和展望.     

太阳能路灯智能控制系统设计

本系统是基于NEWLAB平台而设计的路灯智能控制管理系统,包括了太阳能逐日的能量采集、路灯的智能节能控制和远程的监控显示三部分组成,利用该系统不仅可以实现高效地的太阳能的能量采集,实现节能环保的目的,还可以极大地降低路灯的管理成本以及后期的维修成本。     

远程分布式无线智能路灯监控系统设计

提出一种融合无线传感器网络、GPRS/GSM网络和Internet的智能路灯监控系统设计方案,该系统由远程计算机终端、手机、无线网关及路灯子节点组成;在智能模式下,路灯能够根据周围环境光照度自动亮灭或调整亮度;在控制模式下,值班人员可通过计算机实现对路灯进行单独、部分或整体定时开关灯控制及亮度调节,或通过手机查询系统运行状况;实验结果表明,操作者可远程监控路灯,使其工作于智能模式或控制模式;系统具备路灯故障自动检测功能,确保故障路灯得到及时修复;路灯电源则可在市电和太阳能蓄电池供电两种方式间自动切换以节约电能;系统具有人性化,智能化,性能稳定,成本低廉,节能低耗的特点,值得推广使用.     

太阳能路灯控制器的智能化设计

介绍的智能型控制器用于太阳能路灯系统,其主要功能是白天将太阳能电池发的电存储到蓄电池中,晚上将蓄电池中的电提供给光源进行照明。该控制器在太阳能电池、蓄电池及光源间加入一个有 A/D 转换寄存器和 PWM 输出的8位单片机,通过一定的算法控制,实现了对光源实施时控、光控、分辨季节时差的控制,以及在对蓄电池充电过程中通过PWM调制实现最大功率跟踪技术。在控制器设计中,给出了蓄电池的过充及过放、蓄电池及太阳能电池的防反接、负载的防短路、太阳能路灯系统防雷电、抗干扰等保护措施。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.